class MainActivity

 

package org.androidtown.myspinner;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Spinner;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    Spinner spinner, spinner2;

    String[] names={"소녀시대", "걸스데이", "씨스타", "티아라"};



    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        spinner=(Spinner)findViewById(R.id.spinner);

        //1. 안드로이드 에서 제공되는 어댑터 설정
        ArrayAdapter<String> adapter=new ArrayAdapter<String>(this,
                android.R.layout.simple_spinner_item,
                names
                );

        spinner.setAdapter(adapter);

        spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            @Override
            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {

                Toast.makeText(getApplicationContext()
                    , "선택된 아이템" + names[position],
                        Toast.LENGTH_SHORT
                ).show();
            }

            @Override
            public void onNothingSelected(AdapterView<?> parent) {

            }
        });


        // 2. 스피너 커스텀  어댑터 설정  구조화

/*        ArrayList<SingerVO> strings=new ArrayList<>();
        strings.add(new SingerVO("소녀시대", R.drawable.a1));
        strings.add(new SingerVO("걸스데이", R.drawable.a2));
        strings.add(new SingerVO("씨스타", R.drawable.a3));
        strings.add(new SingerVO("티아라", R.drawable.a4));


        SpinnerAdapter  spinnerAdapter=new SpinnerAdapter(getApplicationContext(), strings);
        spinner2.setAdapter(spinnerAdapter);*/

    }




}

 

 

R.layout.activity_main

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="org.androidtown.myspinner.MainActivity">

    <Button
        android:text="스피너"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_centerHorizontal="true"
        android:layout_marginBottom="167dp"
        android:id="@+id/button"
        android:background="@android:color/holo_green_dark" />

    <Spinner
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/spinner"
        android:layout_alignParentTop="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true" />

    <Spinner
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/spinner"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="66dp"
        android:id="@+id/spinner2" />
</RelativeLayout>